Engine cooling fan - Patent 1443216

(19)

(11)

EP 1 443 216 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.03.2005 Bulletin 2005/12

(43)	Date of publication A2:
	04.08.2004 Bulletin 2004/32

(21)	Application number: 04250114.8

(22)	Date of filing: 12.01.2004

(51)	International Patent Classification (IPC)⁷: F04D 29/54, F04D 29/58, F01P 11/10

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

(30)

Priority:

29.01.2003 US 353476

(71)	Applicant: BorgWarner Inc.
	Auburn Hills, MI 48326-1782 (US)

(72)	Inventor:
	Robb, Neil E. Jackson, Michigan 49203 (US)

(74)	Representative: Lerwill, John et al
	A.A. Thornton & Co. 235 High Holborn London, WC1V 7LE London, WC1V 7LE (GB)

(54)	Engine cooling fan

(57) A stator and diffuser assembly (20) is introduced between an engine cooling fan (10) and engine (12). The stator acts (20) increase the static efficiency per unit airflow of the axial fan by reducing the rotational component of air traveling through the fan (10) and by directing the airflow in an axial direction towards the engine (12). The diffuser (20) acts to increase the static efficiency per unit airflow of the axial fan (10) used by decelerating the airflow, thereby providing more airflow to the engine (12) at a given fan rotational speed. The stator and diffuser assembly thus decreases the amount of horsepower necessary to drive the fan (10) at a given rotational speed and reduces noise.

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